I just read in another post that Vegas 9.0c 64-bit has problems mixing avchd with jpegs - and that's exactly what I'm trying to do and failing. The video behaves ok but jpegs seem to come and go unpredictably. Sometimes you see red in the timeline, sometimes a blank preview screen at that spot, sometimes the preview flashes in and out unpredictably.
Is there a solution? Is there a way to migrate a half-finished 9.0 video back to 8.0 if I need to?